package com.mgm.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * CROS跨域过滤器
 * @ClassName: CROSFilter 
 * @Description: TODO(...) 
 * @author Andy Zhang
 * @date 2018年7月19日 下午3:42:00 
 *
 */
public class CROSFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		String originHeader = request.getHeader("Origin");
		response.setHeader("Access-Control-Allow-Origin", originHeader);
		response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "0");
		response.setHeader("Access-Control-Allow-Headers",
				"Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Accept, Expires, Content-Type, X-E4M-With, Authorization, token");
		response.setHeader("Access-Control-Allow-Credentials", "true");
		response.setHeader("XDomainRequestAllowed", "1");
		response.setHeader("XDomainRequestAllowed", "1");
		chain.doFilter(request, response);
		
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	
}
